ASAHI KASEI

[AKD4555-E]

2005/03

- 1 -

GENERAL DESCRIPTION

AKD4555-E is an evaluation board for the portable digital audio 16bit A/D and D/A converter, AK4555.
The AKD4555-E can evaluate A/D converter and D/A converter separately in addition to loopback mode
(A/D

D/A). The A/D section can be evaluated by interfacing with AKM's DAC evaluation boards directly.

The AKD4555-E has the interface with AKM's ADC evaluation boards. Therefore, it's easy to evaluate the
D/A section. The AKD4555-E also has the digital audio interface and can achieve the interface with digital
audio systems via opt-connector.

Ordering guide

AKD4555

-E

---

Evaluation

board

for

AK4555

FUNCTION

Compatible with 2 types of interface

- Direct interface with AKM's A/D & D/A converter evaluation boards

DIT/DIR

with

optical

input/output

AK4555

REG

VDD

Regulator

AGND

DGND

AINL/
AINR

AOUTL/
AOUTR

AK4114

DIT/DIR

10pin Header

DSP

Opt Out

Opt In

Figure 1. AKD4555-E Block Diagram

* Circuit diagram and PCB layout are attached at the end of this manual.

Evaluation board Rev.0 for AK4555

AKD4555-E

ASAHI KASEI

[AKD4555-E]

2005/03

- 2 -

Evaluation Board Manual

Operation sequence

1) Set up the power supply lines.

[VDD]

(Orange) =

1.6

3.6V : for VDD of AK4555

[REG] (Red) = 5.0V : for regulator
[AGND] (Black) = 0V : for analog ground (including VSS of AK4555)
[DGND] (Black) = 0V : for logic ground

Each supply line should be distributed from the power supply unit.

2) Set up the evaluation mode, jumper pins and DIP switches.

(See the followings.)

3) Power on.

The AK4555 should be reset once bringing SW2 (PDN) "OFF" upon power-up.

ASAHI KASEI

[AKD4555-E]

2005/03

- 3 -

Evaluation mode

Applicable

Evaluation

Mode

1) Evaluation of loopback mode (default)
2) Evaluation of D/A using A/D converted data
3) Evaluation of D/A using DIR (Optical Link)
4) Evaluation of A/D using D/A converted data
5) Evaluation of A/D using DIT (Optical Link)
6) All interface signals including master clock are fed externally.

DIT

PORT2

PORT3

DIR

AKD53XX

A/D Board

AKD43XX

D/A Board

PORT1

AKD4555-E

CD Player

10pin-Header

1) Evaluation of loopback mode. (default)

Nothing should be connected to PORT1/PORT3.

JP4

MCLK

JP5

SCLK

JP7

SDTI

JP6

LRCK

ADC

DIR

ASAHI KASEI

[AKD4555-E]

2005/03

- 4 -

2) Evaluation of D/A using A/D converted data.

D/A part can be evaluated by connecting with AKM's A/D evaluation boards via PORT3.
Nothing should be connected to PORT1

JP4

MCLK

JP5

SCLK

JP7

SDTI

JP6

LRCK

ADC

DIR

3) Evaluation of D/A using DIR. (Optical link)

PORT1 (TORX141) is used. DIR generates MCLK, SCLK, LRCK and SDATA from the received data
through optical connector (TORX141). Used for the evaluation using CD test disk. Nothing should be
connected to PORT2/PORT3.

JP4

MCLK

JP5

SCLK

JP7

SDTI

JP6

LRCK

ADC

DIR

4) Evaluation of A/D using D/A converted data.

A/D part can be evaluated by connecting with AKM's D/A evaluation boards via PORT3.
Nothing should be connected to PORT1.

JP4

MCLK

JP5

SCLK

JP7

SDTI

JP6

LRCK

ADC

DIR

ASAHI KASEI

[AKD4555-E]

2005/03

- 5 -

5) Evaluation of A/D using DIT. (Optical link)

PORT2 (TOTX141) is used. DIT generates audio bi-phase signal from received data and which is output
through optical connector (TOTX141). It is possible to connect AKM's D/A converter evaluation boards
on the digital-amplifier, which equips DIR input.

JP4

MCLK

JP5

SCLK

JP7

SDTI

JP6

LRCK

ADC

DIR

6) All interfacing signals (MCLK, SCLK, LRCK) are fed from the external circuit through PORT3.

Under the following set-up, all external signals needed for the AK4555 to operate could be fed through
PORT3.

JP4

MCLK

JP5

SCLK

JP7

SDTI

JP6

LRCK

ADC

DIR

ASAHI KASEI

[AKD4555-E]

2005/03

- 6 -

DIP switch set up

Upper-side is "ON" ("H") and lower side is "OFF" ("L").

[SW1]: Set up the AK4555 and AK4114.

SW No.

SW Name

Mode

1 DIF2,

AK45545and AK4114 Audio Format Setting
Always ON.

DEM1

Set up the de-emphasis of AK4555

DEM0

(See table 2)

4 NC

use

Table 1. DIPswitch set-up of AK4114

DEM1

(SW1-#2)

DEM0

(SW1-#3)

Mode

OFF

44.1kHz

OFF

ON OFF 48kHz
ON ON 32kHz

Table 2. DIPswitch set up of de-emphasis

ASAHI KASEI

[AKD4555-E]

2005/03

- 7 -

Other jumper pins set up

[JP1] (GND): Connection between AGND and DGND
open:

Both

grounds

are

separated on board.<default>

short: Both grounds are connected on board.

[JP2]

(REG):

Select to regulator

open: On-board regulator is not used. <default>
short: On-board

regulator

used.(The connector "VDD" can be open.)

[JP3] (PWR): Pull up power supply select for SDTO.
VDD: Connected to VDD of AK4555. <default>
D3V:

Supplied

from

regulator

(3V).

The function of the toggle SW.

Upper-side is "ON" and lower side is "OFF".

[SW2] (PDN): Resets the AK4555 and AK4114. Keep "ON" during normal operation.

Indication for LED

[LED1] (ERF): Monitor INT0 pin of the AK4114. LED turns on when some error has occurred to AK4114.

ASAHI KASEI

[AKD4555-E]

2005/03

- 9 -

MEASUREMENT RESULTS

[Measurement condition]

· Measurement unit : Audio Precision, System two
·

MCLK :

256fs

· SCLK : 64fs
· fs : 44.1kHz
·

Bit

16bit

· Power Supply : VDD = VP = 2.5V, VD = 5V
·

Interface

DIT/DIR

Temperature :

Room

1. ADC

VDD Parameter

Measured

Filter AINL AINR

S/(N+D) (-0.5dBFS)

20kHz LPF

80.9 dB

81.0 dB

D-Range (-60dBFS)

20kLPF + A-weighted

89.4 dB

89.2 dB

2.5V

S/N (0 data)

20kLPF + A-weighted

89.3 dB

89.2 dB

2. DAC

VDD Parameter

Measured

Filter AOUTL

AOUTR

S/(N+D) (0dBFS)

20kHz LPF

84.5 dB

D-Range (-60dBFS)

22kLPF + A-weighted

91.6 dB

91.7 dB

2.5V

S/N (0 data)

22kLPF + A-weighted

91.9 dB

92.1 dB

ASAHI KASEI

[AKD4555-E]

2005/03

- 10 -

3.PLOT DATA
3-1 ADC

AKM

AK4554 ADC THD+N vs.Input Level

VDD=2.5V, fs=44.1kHz, fin=1kHz

-90

-60

-88

-86

-84

-82

-80

-78

-76

-74

-72

-70

-68

-66

-64

-62

-120

-10

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

dBr

Fig. 1 THD+N vs. Input Level

AKM

AK4554 ADC THD+N vs. Input Frequency

VDD=2.5V, fs=44.1kHz, Input Level=-0.5dB

-90

-60

-88

-86

-84

-82

-80

-78

-76

-74

-72

-70

-68

-66

-64

-62

20k

100

200

500

10k

Fig.2 THD+N vs. Input Frequency

ASAHI KASEI

[AKD4555-E]

2005/03

- 11 -

AKM

AK4554 ADC Linearity

VDD=2.5V, fs=44.1kHz, fin=1kHz

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

dBr

Fig.3 Linearity

AKM

AK4554 ADC Frequency Response

VDD=2.5V, fs=44.1kHz, Input level=-0.5dB

-3

-2.8

-2.6

-2.4

-2.2

-2

-1.8

-1.6

-1.4

-1.2

-1

-0.8

-0.6

-0.4

-0.2

20k

100

200

500

10k

Fig.4 Frequency Response

ASAHI KASEI

[AKD4555-E]

2005/03

- 12 -

AKM

AK4554 ADC FFT Plot

VDD=2.5V, fs=44.1kHz, fin=1kHz, Input Level=-0.5dB

20k

100

200

500

10k

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Fig.5 FFT Plot (Input Level = -0.5dB)

AKM

AK4554 ADC FFT Plot

VDD=2.5V, fs=44.1kHz, fin=1kHz, Input Level=-60dB

20k

100

200

500

10k

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Fig.6 FFT Plot (Input Level = -60dB)

ASAHI KASEI

[AKD4555-E]

2005/03

- 14 -

3-2. DAC

AKM

AK4554 DAC THD+N vs. Input Level

VDD=2.5V, fs=44.1kHz, fin=1kHz

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

dBFS

-100

-60

-98

-96

-94

-92

-90

-88

-86

-84

-82

-80

-78

-76

-74

-72

-70

-68

-66

-64

-62

Fig.9 THD+N vs. Input Level

AKM

AK4554 DAC THD+N vs. Input Frequency

VDD=2.5V, fs=44.1kHz, Input Level=0dB

20k

100

200

500

10k

-100

-60

-98

-96

-94

-92

-90

-88

-86

-84

-82

-80

-78

-76

-74

-72

-70

-68

-66

-64

-62

Fig.10 THD+N vs. Input Frequency

ASAHI KASEI

[AKD4555-E]

2005/03

- 15 -

AKM

AK4554 DAC Linearity

VDD=2.5V, fs=44.1kHz, fin=1kHz

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

dBFS

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Fig.11 Linearity

AKM

AK4554 DAC Frequency Response

VDD=2.5V, fs=44.1kHz, Input Level=0dB

20k

10k

12k

14k

16k

18k

-1

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

+0.1

+0.2

+0.3

+0.4

+0.5

+0.6

+0.7

+0.8

+0.9

Fig.12 Frequency Response

ASAHI KASEI

[AKD4555-E]

2005/03

- 16 -

AKM

AK4554 DAC FFT Plot

VDD=2.5V, fs=44.1kHz,fin=1kHz, Input Level=0dB

20k

100

200

500

10k

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Fig.13 FFT Plot (Input Level = 0dB)

AKM

AK4554 DAC FFT Plot

VDD=2.5V, fs=44.1kHz,fin=1kHz, Input Level=-60dB

20k

100

200

500

10k

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

Fig.14 FFT Plot (Input Level = -60dB)

ASAHI KASEI

[AKD4555-E]

2005/03

- 19 -

Revision History

Date

(YY/MM/DD)

Manual

Revision

Board

Revision

Reason Contents

05/03/31 KM078200 0 First

Edtion

IMPORTANT NOTICE

These products and their specifications are subject to change without notice. Before considering

any use or application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or
authorized distributor concerning their current status.

AKM assumes no liability for infringement of any patent, intellectual property, or other right in the

application or use of any information contained herein.

Any export of these products, or devices or systems containing them, may require an export license

or other official approval under the law and regulations of the country of export pertaining to customs
and tariffs, currency exchange, or strategic materials.

AKM products are neither intended nor authorized for use as critical components in any safety, life

support, or other hazard related device or system, and AKM assumes no responsibility relating to
any such use, except with the express written consent of the Representative Director of AKM. As
used here:

(a) A hazard related device or system is one designed or intended for life support or maintenance of

safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its
failure to function or perform may reasonably be expected to result in loss of life or in significant
injury or damage to person or property.

(b) A critical component is one whose failure to function or perform may reasonably be expected to

result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or
system containing it, and which must therefore meet very high standards of performance and
reliability.

It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of, or

otherwise places the product with a third party to notify that party in advance of the above content
and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability
for and hold AKM harmless from any and all claims arising from the use of said product in the
absence of such notification.

REG

4554_SDTO

BCLK

MCLK

LRCK

SDTI

DEM1

DEM0

PWDAN

LVC

VDD

Title

Size

Document Number

Rev

Date:

Sheet

AK4555

AKD4555-E

Wednesday, March 02, 2005

Title

Size

Document Number

Rev

Date:

Sheet

AK4555

AKD4555-E

Wednesday, March 02, 2005

Title

Size

Document Number

Rev

Date:

Sheet

AK4555

AKD4555-E

Wednesday, March 02, 2005

DGND

AGND

(5V)

(1.6-3.6V)

OUT

GND

TA4803F

4.7u

560

0.1u

R11 51

REG

T45_R

REG

T45_R

(short)

22u

JP2
REG

560

5.1

C11

10u

C11

10u

220

R12 51

0.1u

AOUTL/AOUTR

10k

22u

JP1

GND

JP1

GND

4.7u

VDD

T45_O

VDD

T45_O

C10

47u

C10

47u

DGND

T45_BK

DGND

T45_BK

AINL/AINR

220

VCOM

AINR

AINL

VSS

VDD

DEM0

DEM1

SDTO

LRCK

MCLK

SCLK

PWADN

AOUTL

PWDAN

AOUTR

SDTI

AK4555

47u

0.1u

AGND

T45_BK

AGND

T45_BK

10k

0.1u

R10 51

4114_PDN

SDTO

DIR_SDTO

DIR_BICK

DIR_LRCK

DIR_MCKO

DEM0

DEM1

Title

Size

Document Number

Rev

Date:

Sheet

DIR/DIT

AKD4555-E

Monday, February 07, 2005

Title

Size

Document Number

Rev

Date:

Sheet

DIR/DIT

AKD4555-E

Monday, February 07, 2005

Title

Size

Document Number

Rev

Date:

Sheet

DIR/DIT

AKD4555-E

Monday, February 07, 2005

DIF2,0

DEM 1

DEM 0

AK4555

AK4550/4

DIF2, 0

OFF

DEM1

DEM0

OFF

44.1k

OFF

48k

32k

DIP SW

C13

10u

C13

10u

C16

0.47u

C16

0.47u

RP1

47k

RP1

47k

R15

R16

5.1

R16

5.1

47u

TP1 EXTCLK

C21

10u

C21

10u

C18

C15

0.1u

C15

0.1u

LED1

ERF

LED1

ERF

C19

0.1u

C19

0.1u

C20

0.1u

C20

0.1u

OUT

VCC

GND

PORT1

TORX141

PORT1

TORX141

C14

10u

C14

10u

C12

0.1u

C12

0.1u

11.2896MHz

C17

R13

470

R13

470

C23

0.1u

C23

0.1u

IPS0

DIF0

TEST2

DIF1

DIF2

IPS1

P/SN

XTL0

XTL1

TVD

VSS

TX0

TX1

COUT

UOUT

VSS

KO1

BICK

MCKO2

DAUX

XTO

XTI

PDN

CM0

CM1

OCKS1

OCKS0

INT0

AVD

AVSS

TEST1

VIN

LRCK

SDTO

AK4114

GND

VCC

PORT2

TOTX141

PORT2

TOTX141

C22

10u

C22

10u

R14

18k

R14

18k

SW1

MODE2

SW1

MODE2

U3A

74HC14

U3A

74HC14

LRCK

DIR_SDTO

MCLK

SDTO

BCLK

SDTI

LVC

4114_PDN

PWDAN

DIR_MCKO

DIR_BICK

DIR_LRCK

4554_SDTO

SDTO

LVC

VDD

Title

Size

Document Number

Rev

Date:

Sheet

LOGIC

AKD4555-E

Monday, February 07, 2005

Title

Size

Document Number

Rev

Date:

Sheet

LOGIC

AKD4555-E

Monday, February 07, 2005

Title

Size

Document Number

Rev

Date:

Sheet

LOGIC

AKD4555-E

Monday, February 07, 2005

DIR

BICK

ADC

SDTI

MCLK

LRCK

for
74LVC07ANS

for
74HC14

GND

SDTO

VDD

D3V

U3C

74HC14

U3C

74HC14

PORT3

DSP

PORT3

DSP

JP6LRCK

D1
1S1588

VCC

GND

74LVC541

C27

0.1u

C27

0.1u

SW2
PDN

R19

10k

R19

10k

C24

0.1u

C24

0.1u

JP5SCLK

JP7

SDTI

JP7

SDTI

R18
10k

R17

U3B

74HC14

U3B

74HC14

JP3 PWR

C25
0.1u

U5A

74LVC07ANS

U5A

74LVC07ANS

C26

0.1u

C26

0.1u

JP4MCLK

LVC

Title

Size

Document Number

Rev

Date:

Sheet

AKD4555-E

Monday, February 07, 2005

Title

Size

Document Number

Rev

Date:

Sheet

AKD4555-E

Monday, February 07, 2005

Title

Size

Document Number

Rev

Date:

Sheet

AKD4555-E

Monday, February 07, 2005

U5F

74LVC07ANS

U5F

74LVC07ANS

U5C

74LVC07ANS

U5C

74LVC07ANS

U5B

74LVC07ANS

U5B

74LVC07ANS

U3E

74HC14

U3E

74HC14

U5E

74LVC07ANS

U5E

74LVC07ANS

U3D

74HC14

U3D

74HC14

U5D

74LVC07ANS

U5D

74LVC07ANS

U3F

74HC14

U3F

74HC14

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